WILLOW FAMILY 197 



56. S. pellita Anders. A low shrub; leaf -blades oblanceolate, 3-7 cm. long, 

 with entite , somewhat revolute margins, acute or obtuse at the apex, tapering 

 at the base, glabrous or slightly pubescent above when young; aments sessile 

 and naked, 2-3 cm. long; bractlets obovate, brown, with black tip, or wholly 

 blackish, silky; capsule 3-4 mm. long, villous, subsessile; style nearly 1 mm. long. 

 River banks: Me. Que. Sask. Alta. Boreal. Je. 



57. S. subcoerulea Piper. Shrub about 2 m. high; leaf-blades oblance- 

 olate, entire or nearly so, green and minutely pubescent above, 2-5 cm. long, 

 1 cm. wide or less; aments 2.5-4 cm. long, less than 1 cm. thick; capsule white- 

 silky, 2-3 mm. long, subsessile; style about 1 mm. long. BLUE WILLOW. River 

 banks: B.C. Mont. Wyo. Calif. My-Jl. 



58. S. pachnophora Rydb. A shrub 2-3 m. high or perhaps sometimes 

 higher; leaf -blades oblong-lanceolate or oblanceolate, 3-5 cm. long, acute at 

 both ends, densely white-silky beneath, glabrate above, rather thin; aments 

 1-3 cm. long; capsule grayish silky, ovoid, 3-5 mm. long; style slender, about 

 1.5 mm. long. River banks: Colo. X.M. Utah. Submont. Mont. My-Je. 



59. S. brachycarpa Nutt. A shrub 1 m. high or less; bark yellow; twigs 

 densely villous; leaf-blades oblong to oval or oblanceolate, 1-3 cm. long, entire- 

 margined; aments 1-2 cm. long; bracts yellow, obovate, villous; capsule 4-5 mm. 

 long, villous, subsessile; style less than 0.5 mm. long. S. stricta (Anders.) Rydb. 

 Wet places in the mountains: B.C. Colo. Alta; Que. Submont. Subalp. 

 Jl-Au. 



60. S. idahoensis (Ball) Rydb. Shrub 1-2 m. high; branches yellowish or 

 light brown, silky when young; leaf -blades oblanceolate, 3-5 cm. long, entire; 

 aments 1-2 cm. long; bractlets obovate, brownish; capsules ovoid, subsessile, 

 finely and sparingly pubescent; style about 1 mm. long. S. Wolfii idahoensis 

 Ball. Banks and marshes: Ore. -Wyo. -Wash. Submont. -Mont. Je-Jl. 



61. S. pseudolapponum v. Seem. A shrub 1 m. high or less; twigs brown, 

 at first grayish pubescent; leaf-blades oblong or lance-oblong, acute at both 

 ends, entire-margined, green above, gray below; aments appearing with the 

 leaves, 1-2 cm. long; bractlets brown below, with black tips; capsule grayish, 

 villous, subsessile, about 5 mm. long; style about 0.5 mm. long. Summits: 

 Colo.- Subalp. Alp. Je-Jl. 



62. S. glaucops Anders. A shrub 1-2 m. high; twigs usually more or 

 less villous: leaf-blades green above, paler beneath, entire-margined, 3-6 cm. 

 long; aments 2-3 cm. long; bractlets fuscous, oblong, often acutish, short-villous; 

 capsule grayish villous, about 5 mm. long, subsessile; style about 0.5 mm. long. 

 Mountains: Alta. -N.M. Utah 'Calif. Yukon. Submont. Subalp. Je-Jl. 



S. glaucops X monticola. It resembles S. glaucops in the capsules and bractlets, 

 but the former are less densely hairy; the leaves and bark are more like those of S. monti- 

 cola, tbe former being finely serrate, glabrate in age, and glaucous beneath; the young 

 branches are somewhat villous. Big Cottonwood Canon, Utah. 



63. S. Seemannii Rydb. A shrub 3-4 m. high; young twigs villous- 

 pubescent; leaf-blades oval to oblong-lanceolate, 3-7 cm. long, rather firm, entire- 

 margined, sometimes glabrate above in age; aments 2-7 cm. long; bracts obtuse, 

 villous; capsule about 8 mm. long, densely white-villous, subsessile; style 0.5-1 

 mm. long. Mountains: Alaska 'Yukon Mont. Subalp. Je-Jl. 



64. S. subcordata Anders. A low shrub, with erect stems; leaf -blades 

 obovate, oval, or rounded, sometimes subcordate at the base, 2-5 cm. long, 1-4 

 cm. wide, paler and strongly reticulated beneath; aments 2-3 cm. long; bractlets 

 yellow, usually with darker tips; capsule white-villous, subsessile; style nearly 

 1 mm. long. Mountains: Alta. B.C. Mont. Jl-Au. 



65. S. desertorum Richards. A shrub 1-2 m. high; leaf -blades 1-3 cm. 

 long, entire-margined, dark green above, glaucous beneath; aments 1-3 cm. long; 

 bracts obovate, brown or yellow, sparingly pubescent; capsule densely white- 

 villous, 3-4 mm. long, subsessile; style about 0.5 mm. long. BARREN-GROUND 

 WILLOW. Wet places: Sask. Alta. Mack.; (Gaspe Peninsula) Que. Boreal 

 S u barctic . Jl-Au . 



